<template>
  <!--登陆页面-->
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >
      <!--标题-->
      <div class="title-container">
        <h3 class="title">智慧冰箱后台管理页面</h3>
      </div>
      <!--用户名-->
      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="id"
          v-model="loginForm.id"
          placeholder="请输入员工号【数字】"
          name="id"
          type="text"
          tabindex="1"
          auto-complete="on"
          @input="handleEdit"
        />
      </el-form-item>
      <!--密码-->
      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="请输入密码"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>
      <!--验证码-->
      <el-form-item prop="verifyCode">
        <span class="svg-container">
          <svg-icon icon-class="verifyCode" />
        </span>
        <el-input
          v-model="loginForm.verifyCode"
          type="text"
          auto-complete="false"
          placeholder="点击图片更换验证码"
          style="width: 200px; margin-right: 5px"
        />
        <div
          style="
            float: right;
            margin-top: 12px;
            margin-right: 10px;
          "
        >
          <img :src="verifyCodePicUrl" width="90px" @click="getVerifyPic">
        </div>
      </el-form-item>
      <!--提交-->
      <el-button
        :loading="loading"
        type="primary"
        style="width:100%;margin-bottom:30px;"
        @click.native.prevent="handleLogin"
      >登录
      </el-button>

    </el-form>
  </div>
</template>

<script>
import { loginVerifyPic } from '@/api/login/login'

export default {
  name: 'Login',
  data() {
    return {
      verifyCodePicUrl: '',
      loginForm: {
        id: '',
        password: '',
        verifyKey: '',
        verifyCode: ''
      },
      loginRules: {
        id: [{ required: true, trigger: 'blur', message: '请输入员工号' }],
        password: [{ required: true, trigger: 'blur', message: '请输入密码' }],
        verifyCode: [
          { required: true, message: '请输入验证码', trigger: 'blur' },
          { min: 4, max: 4, message: '长度为 4 个字符', trigger: 'blur' }
        ]
      },
      loading: false,
      passwordType: 'password',
      redirect: '/'
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  created() {
    this.getVerifyPic()
  },
  methods: {
    // 在 Input 值改变时触发
    handleEdit(e) {
      let value = e.replace(/[^\d]/g, '') // 只能输入数字
      value = value.replace(/^0+(\d)/, '$1') // 第一位0开头，0后面为数字，则过滤掉，取后面的数字
      value = value.replace(/(\d{15})\d*/, '$1') // 最多保留15位整数
      this.loginForm.id = value
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    getVerifyPic() {
      const that = this
      loginVerifyPic().then((res) => {
        // console.log(res)
        that.loginForm.verifyKey = res.data.key
        that.verifyCodePicUrl = 'data:image/png;base64,' + res.data.image
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
            this.getVerifyPic()
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
